I spoke to one of the guys at best buy asking about the differences between the 720p 1080p and 1080i. He said you don't need the 1080i unless you have blue ray disc player. Between the 720p and 1080p he said there is no distinguishable difference. Just be prepared for all the additional equipment they will recommend. That got to be expensive. Maybe do some research before you go whether you need power regulator with the TV. That was $299 on top of the price on the TV.
http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=1162413&page=2#Post1162413 M-28 W-28 Together 10 years Married 2 years No children Things started taking a turn in 01/07